Regenerator-furnace



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W. SWINDELL. REGENERATOR FURNACE. No. 305,408. Patented Sept. 16, 1884.

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REGENERATOR FURNACE.

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NITED r Snares WILLIAM SWINDELL, OF ALLEGHENY CITY, PENNSYLVANIA.

REGENERATOR-FURNAC E.

SPECIFICATION forming part of Letters Patent No. 305,408, dated September 16, 1884.

' Application filed April 3, 1884. (N model.)

new and useful Improvement in Regenerator- Furnaces; and I do hereby declare the followingto be a full, clear, and exact description thereof.

Heretofore the valves of metallurgical regenerator-furnaces have been arranged on the same level. This construction necessitated the use of crown boxes or caps over the valvechambers through which the air and gas had to descend to pass into the flues which give access to the regenerators. It also necessitated the placing of one of the waste-fines leading from the valve-chambers below the other, so that the waste from one of the regenerators, customarily the air-regenerator, had to descend in a vertical direction through and from the valve-chamber before it could enter the horizontal waste-flue. The waste-fines are usually arranged one over the other in the same vertical plane, and as I construct them 2: are controlled by separate valves. They then merge into a common stack-flue. When the inlet-valves are arranged on the same level, they are side by side, and the remaining sides are surrounded by the inlet and outlet flues in o.such a manner that the air and gas must enter above and descend through them. After passing through the valves the currents are again turned and pass downward to lateral horizontal lines which lead to the regenerators.

flues the direction of the currents is again changed and are forced to traverse a comparatively long distance before they enter the re- The waste products in passing generators. from the furnace-bed to the stack traverse the same course in the opposite direction, and are compelled to make an equal number of turns, because, although not going out of the crownboxes after passing the valves, they descend 4 5 from the valves and turn into the waste-flues. The result of these frequent changes of direction is that the draft is retarded by the reactions or back-pressure occurring at each turn, and the efficiency of the furnace is correspondingly reduced. The longer the vertical run the greater the retardation, because the gases acquire a greater momentum and produce a In entering these lateral horizontal.

The length of the verti-' from the valve before it enters the regcnerators when arranged laterally, as heretofore, causes a considerable loss of gas at each re versal, because when the gas-valve is turned all the gas in the regenerator and in the gasflues between the regenerator and valve is immediately driven into the stackflue and lost. Therefore the shorter the flues are the less this loss will be.

My present invention consists in certain improvements in arranging the gas and air valves on different levels, so that the gas and air may be caused to enter their chambers by direct and horizontal passages instead of by vertical and lateral passages, thereby reducing the obstructions to the currents and the length of intermediate run, so as to increase their effective velocity and the efficiency of the furnace. By the same construction I am enabled to cause the waste currents to pass horizontally or nearly so into the waste-fines, so that the same principle of operation is carried consistently through the entire system of bottom flues. The regenerators being arranged mainly below the level of the bed, it is of course necessary that the currents rise vertically through them; but, aside from this, I aim to secure as nearly as possible a horizontal run of the currents, and thereby reduce greatly the obstruction to the draft.

To enable others skilled in the art to make and use my improvements, I will now describe them by reference to the accompanying drawings, in which- Figure 1 is a longitudinal vertical section of the furnace on the line A B O D, Fig. 3, being a vertical cut through the gas valve and port to the right of the center line, and a like out through the air valve and port to the left of the center line. Fig. 2 is a sectional plan of the heating-chamber and'ports of the furnace on the line E F, Fig. 1. Fig. 3 is a sectional plan on the line G H, Fig. 1. Fig.

tion of, the furnace shown, except so far as is necessary in describingmy improvements. It has a bed or heating-chamber, 1, of the usual form, gasregenerators 2 2, arranged between the'bed and the air-regenerators 3 3, flues 44., leading directly from the gas-valve to the lower ends of the. gas-regenerators, 3,flues 5 5,

leading directly from the air-valve to the lower ends of the air-regenerators, fines 6 6 and 7 7, alternately arranged, leading from the upper ends of the gas and air-regenerators to the bed, vertical reversing-valves 8 9, for controlling the admission of the gas and air,

waste-fines 1O 11, leading directly from the reversing-valves to the stack-flue, and controlled by separate valves 12 13, and a stackflue, 14', leading to the stack 15. The valves 8 9 are arranged directly under the bed, and communicate with the regenerators, which are arranged outside of them, by the direct intermediate flues, 4 5.

Instead of arranging the reversing-valves and their regenerator-flues as heretofore on the same level and providing crown-boxes above them for the entrance of the air and gas, I arrange the air-valve9 on ahigher'plane than the gas-valve 8, as shownin Figs. 1 and 6.

In Fig. 3 the air-valve and the waste-flue valve 13, although above the section-line, are shown in broken lines to indicate their relative positions to the fines and the other valves.-

7 through an opening controlled by the valvebox 16 entering it horizontally through its -ciency of the furnace.

side, and thence into the flue 4, Figs.'1 and The waste inpassing from the furnace flows horizontally from the reversing-valves by the waste-fines 10 11 into the stack-flue 14, as will be understood from Fig. 6. Thus I cause the currents bothtoenter andleave .thereversing valve boxes at the sides and in a horizontal or practically horizontal plane, and to pass.

horizontally to the regenerators by a single direct intermediate flue. By this construction I avoid much of the retardation caused by the creation of baek-pressure or reaction in the bottom fines, and increase greatly the effi- I also reduce the loss of gas occasioned by reversal ofthe furnace when the gas-flucs are full. The valve-boxes 16 17 are provided with disk-covers 21 22, in which are hinged doors 23 24, Fig. 7, by

which access may be had conveniently to the The valves 8 9 are operatedby lev-' valves. ers 25, connected to the rod 26, which .is actuated by the lever 27, Figs. 6 and 7. The valves 12, 13, 18, and 19 are'raised by separate chains 28, which are operated bysuitable levers or other means.

What I claim as myinvention, and desire to secure by Letters Patent, is-

1. A regenerator-furnace havingits reversing-valves arranged on different horizontal planes, substantially as and for the purposes described.

2. .A regenerator-furnace having its reversing-valves and their respective fiues arranged ondifferent horizontal planes, and reversingvalve boxes with provision for admitting the air and gas through the sides, substantially as and for the purposes described.

3. A regenerator-furnace having its reversing-valves arranged between theregenerators on different horizontal planes, and horizontal regenerator fiues leading directly from the valves to the regenerators, substantially as and for the purposes specified.

In testimony whereof I have hereunto set my hand this 31st day of March, A. 111884;

WILLIAM SWINDELL. 

